%0 Journal Article %A Andrzej DerdziƄski %T Certain connections between time functions and compact spacelike submanifolds %J Colloquium Mathematicum %D 1978 %P 55-64 %V 39 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-39-1-55-64/ %R 10.4064/cm-39-1-55-64 %G en %F 10_4064_cm_39_1_55_64